[ci] Switch Windows build script to build.py

.github/workflows/scripts/build.py

@@ -1,25 +1,76 @@
 #!/usr/bin/env python3
 
-# -- prioritized --
 import ci_common  # isort: skip, early initialization happens here
 
-# -- stdlib --
 import glob
 import os
 import platform
+from pathlib import Path
 
-# -- third party --
-# -- own --
 from ci_common.dep import download_dep
-from ci_common.misc import banner, get_cache_home, is_manylinux2014
-from ci_common.python import setup_python
+from ci_common.misc import (banner, get_cache_home, is_manylinux2014,
+                            path_prepend)
+from ci_common.python import path_prepend, setup_python
 from ci_common.sccache import setup_sccache
-from ci_common.tinysh import Command, environ, git, sh
+from ci_common.tinysh import Command, git, sh
 
 
 # -- code --
+@banner('Setup Clang')
+def setup_clang(as_compiler=True) -> None:
+    '''
+    Setup Clang.
+    '''
+    u = platform.uname()
+    if u.system == 'Linux':
+        pass
+    elif (u.system, u.machine) == ('Windows', 'AMD64'):
+        out = get_cache_home() / 'clang-15'
+        url = 'https://github.com/python3kgae/taichi_assets/releases/download/llvm15_vs2022_clang/clang-15.0.0-win.zip'
+        download_dep(url, out)
+        clang = str(out / 'bin' / 'clang++.exe').replace('\\', '\\\\')
+        os.environ['TAICHI_CMAKE_ARGS'] += f' -DCLANG_EXECUTABLE={clang}'
+
+        if as_compiler:
+            os.environ['TAICHI_CMAKE_ARGS'] += (
+                f' -DCMAKE_CXX_COMPILER={clang}'
+                f' -DCMAKE_C_COMPILER={clang}')
+    else:
+        # TODO: unify all
+        pass
+
+
+@banner('Setup MSVC')
+def setup_msvc() -> None:
+    assert platform.system() == 'Windows'
+    os.environ['TAICHI_USE_MSBUILD'] = '1'
+
+    url = 'https://aka.ms/vs/17/release/vs_BuildTools.exe'
+    out = Path(
+        r'C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools')
+    download_dep(
+        url,
+        out,
+        args=[
+            '--passive',
+            '--wait',
+            '--norestart',
+            '--includeRecommended',
+            '--add',
+            'Microsoft.VisualStudio.Workload.VCTools',
+            # NOTE: We are using the custom built Clang++,
+            #       so components below are not necessary anymore.
+            # '--add',
+            # 'Microsoft.VisualStudio.Component.VC.Llvm.Clang',
+            # '--add',
+            # 'Microsoft.VisualStudio.ComponentGroup.NativeDesktop.Llvm.Clang',
+            # '--add',
+            # 'Microsoft.VisualStudio.Component.VC.Llvm.ClangToolset',
+        ])
+
+
 @banner('Setup LLVM')
-def setup_llvm(env_out: dict) -> None:
+def setup_llvm() -> None:
     '''
     Download and install LLVM.
     '''
@@ -28,7 +79,7 @@ def setup_llvm(env_out: dict) -> None:
         if 'AMDGPU_TEST' in os.environ:
             # FIXME: AMDGPU bots are currently maintained separately,
             #        we should unify them with the rest of the bots.
-            env_out['LLVM_DIR'] = '/taichi-llvm-15'
+            os.environ['LLVM_DIR'] = '/taichi-llvm-15'
             return
         elif is_manylinux2014():
             # FIXME: prebuilt llvm15 on ubuntu didn't work on manylinux2014 image of centos. Once that's fixed, remove this hack.
@@ -37,54 +88,82 @@ def setup_llvm(env_out: dict) -> None:
         else:
             out = get_cache_home() / 'llvm15'
             url = 'https://github.com/taichi-dev/taichi_assets/releases/download/llvm15/taichi-llvm-15-linux.zip'
+        download_dep(url, out, strip=1)
     elif (u.system, u.machine) == ('Darwin', 'arm64'):
         out = get_cache_home() / 'llvm15-m1'
         url = 'https://github.com/taichi-dev/taichi_assets/releases/download/llvm15/taichi-llvm-15-m1.zip'
+        download_dep(url, out, strip=1)
     elif (u.system, u.machine) == ('Darwin', 'x86_64'):
         out = get_cache_home() / 'llvm15-mac'
         url = 'https://github.com/taichi-dev/taichi_assets/releases/download/llvm15/llvm-15-mac10.15.zip'
+        download_dep(url, out, strip=1)
+    elif (u.system, u.machine) == ('Windows', 'AMD64'):
+        out = get_cache_home() / 'llvm15'
+        url = 'https://github.com/python3kgae/taichi_assets/releases/download/llvm15_vs2019_clang/taichi-llvm-15.0.0-msvc2019.zip'
+        download_dep(url, out, strip=0)
     else:
         raise RuntimeError(f'Unsupported platform: {u.system} {u.machine}')
 
-    download_dep(url, out, strip=1)
-    env_out['LLVM_DIR'] = str(out)
+    path_prepend('PATH', out / 'bin')
+    os.environ['LLVM_DIR'] = str(out)
 
 
 @banner('Setup Vulkan 1.3.236.0')
-def setup_vulkan(env: dict):
+def setup_vulkan():
     u = platform.uname()
     if u.system == "Linux":
         url = 'https://sdk.lunarg.com/sdk/download/1.3.236.0/linux/vulkansdk-linux-x86_64-1.3.236.0.tar.gz'
         prefix = get_cache_home() / 'vulkan-1.3.236.0'
         download_dep(url, prefix, strip=1)
         sdk = prefix / 'x86_64'
-        env['VULKAN_SDK'] = str(sdk)
-        env['PATH'] = str(sdk / "bin") + ':' + env["PATH"]
-        env['LD_LIBRARY_PATH'] = str(sdk / "lib") + ':' + env.get(
-            "LD_LIBRARY_PATH", "")
-        env['VK_LAYER_PATH'] = str(sdk / 'etc' / 'vulkan' / 'explicit_layer.d')
+        os.environ['VULKAN_SDK'] = str(sdk)
+        path_prepend('PATH', sdk / "bin")
+        path_prepend('LD_LIBRARY_PATH', sdk / 'lib')
+        os.environ['VK_LAYER_PATH'] = str(sdk / 'etc' / 'vulkan' /
+                                          'explicit_layer.d')
     # elif (u.system, u.machine) == ("Darwin", "arm64"):
     # elif (u.system, u.machine) == ("Darwin", "x86_64"):
-    # elif u.system == "Windows":
+    elif (u.system, u.machine) == ('Windows', 'AMD64'):
+        url = 'https://sdk.lunarg.com/sdk/download/1.3.236.0/windows/VulkanSDK-1.3.236.0-Installer.exe'
+        prefix = get_cache_home() / 'vulkan-1.3.236.0'
+        download_dep(
+            url,
+            prefix,
+            args=[
+                '--accept-licenses',
+                '--default-answer',
+                '--confirm-command',
+                '--root',
+                prefix,
+                'install',
+                'com.lunarg.vulkan.sdl2',
+                'com.lunarg.vulkan.glm',
+                'com.lunarg.vulkan.volk',
+                'com.lunarg.vulkan.vma',
+                # 'com.lunarg.vulkan.debug',
+            ])
+        os.environ['VULKAN_SDK'] = str(prefix)
+        os.environ['VK_SDK_PATH'] = str(prefix)
+        path_prepend('PATH', prefix / "Bin")
     else:
         return
 
 
 @banner('Build Taichi Wheel')
-def build_wheel(python: Command, pip: Command, env: dict) -> None:
+def build_wheel(python: Command, pip: Command) -> None:
     '''
     Build the Taichi wheel
     '''
     pip.install('-r', 'requirements_dev.txt')
     git.fetch('origin', 'master', '--tags')
-    proj = env['PROJECT_NAME']
+    proj = os.environ.get('PROJECT_NAME', 'taichi')
     proj_tags = []
     extra = []
 
     if proj == 'taichi-nightly':
         proj_tags.extend(['egg_info', '--tag-date'])
         # Include C-API in nightly builds
-        env['TAICHI_CMAKE_ARGS'] += ' -DTI_WITH_C_API=ON'
+        os.environ['TAICHI_CMAKE_ARGS'] += ' -DTI_WITH_C_API=ON'
 
     if platform.system() == 'Linux':
         if is_manylinux2014():
@@ -95,25 +174,27 @@ def build_wheel(python: Command, pip: Command, env: dict) -> None:
     python('misc/make_changelog.py', '--ver', 'origin/master', '--repo_dir',
            './', '--save')
 
-    with environ(env):
-        python('setup.py', *proj_tags, 'bdist_wheel', *extra)
+    python('setup.py', *proj_tags, 'bdist_wheel', *extra)
 
 
 def main() -> None:
-    env = {
-        'PATH': os.environ['PATH'],
-        'LD_LIBRARY_PATH': os.environ.get('LD_LIBRARY_PATH', ''),
-        'TAICHI_CMAKE_ARGS': os.environ.get('TAICHI_CMAKE_ARGS', ''),
-        'PROJECT_NAME': os.environ.get('PROJECT_NAME', 'taichi'),
-    }
-    setup_llvm(env)
-    setup_vulkan(env)
-    sccache = setup_sccache(env)
+    u = platform.uname()
+    if (u.system, u.machine) == ('Windows', 'AMD64'):
+        # Use MSVC on Windows
+        setup_clang(as_compiler=False)
+        setup_msvc()
+    else:
+        # Use Clang on all other platforms
+        setup_clang()
+
+    setup_llvm()
+    setup_vulkan()
+    sccache = setup_sccache()
 
     # NOTE: We use conda/venv to build wheels, which may not be the same python
     #       running this script.
-    python, pip = setup_python(env, os.environ['PY'])
-    build_wheel(python, pip, env)
+    python, pip = setup_python(os.environ['PY'])
+    build_wheel(python, pip)
 
     sccache('-s')
 

.github/workflows/scripts/ci_common/bootstrap.py

@@ -1,16 +1,11 @@
-# -*- coding: utf-8 -*-
-
-# -- stdlib --
 import importlib
 import os
+import platform
+import subprocess
 import sys
 from pathlib import Path
 
-# -- third party --
-# -- own --
-
 
-# -- code --
 def is_in_venv() -> bool:
     '''
     Are we in a virtual environment?
@@ -19,15 +14,55 @@ def is_in_venv() -> bool:
                                            and sys.base_prefix != sys.prefix)
 
 
+def get_cache_home() -> Path:
+    '''
+    Get the cache home directory. All intermediate files should be stored here.
+    '''
+    if platform.system() == 'Windows':
+        return Path(os.environ['LOCALAPPDATA']) / 'build-cache'
+    else:
+        return Path.home() / '.cache' / 'build-cache'
+
+
+def run(*args, env=None):
+    args = list(map(str, args))
+    if env is None:
+        return subprocess.Popen(args).wait()
+    else:
+        e = os.environ.copy()
+        e.update(env)
+        return subprocess.Popen(args, env=e).wait()
+
+
+def restart():
+    '''
+    Restart the current process.
+    '''
+    if platform.system() == 'Windows':
+        # GitHub Actions will treat the step as completed when doing os.execl in Windows,
+        # since Windows does not have real execve, its behavior is emulated by spawning a new process and
+        # terminating the current process. So we do not use os.execl in Windows.
+        os._exit(run(sys.executable, *sys.argv))
+    else:
+        os.execl(sys.executable, sys.executable, *sys.argv)
+
+
 def ensure_dependencies(fn='requirements.txt'):
     '''
     Automatically install dependencies if they are not installed.
     '''
+
+    if 'site' in sys.modules:
+        sys.argv.insert(0, '-S')
+        restart()
+
     p = Path(__file__).parent.parent / fn
     if not p.exists():
         raise RuntimeError(f'Cannot find {p}')
 
-    user = '' if is_in_venv() else '--user'
+    bootstrap_root = get_cache_home() / 'bootstrap'
+    bootstrap_root.mkdir(parents=True, exist_ok=True)
+    sys.path.insert(0, str(bootstrap_root))
 
     with open(p) as f:
         deps = [i.strip().split('=')[0] for i in f.read().splitlines()]
@@ -36,12 +71,17 @@ def ensure_dependencies(fn='requirements.txt'):
         for dep in deps:
             importlib.import_module(dep)
     except ModuleNotFoundError:
-        print('Installing dependencies...')
-        if os.system(f'{sys.executable} -m pip install {user} -U pip'):
+        print('Installing dependencies...', flush=True)
+        pipcmd = [
+            sys.executable, '-m', 'pip', 'install',
+            f'--target={bootstrap_root}', '-U'
+        ]
+        if run(*pipcmd, 'pip', 'setuptools'):
             raise Exception('Unable to upgrade pip!')
-        if os.system(f'{sys.executable} -m pip install {user} -U -r {p}'):
+        if run(*pipcmd, '-r', p, env={'PYTHONPATH': str(bootstrap_root)}):
             raise Exception('Unable to install dependencies!')
-        os.execl(sys.executable, sys.executable, *sys.argv)
+
+        restart()
 
 
 def chdir_to_root():
@@ -51,7 +91,7 @@ def chdir_to_root():
     root = Path('/')
     p = Path(__file__).resolve()
     while p != root:
-        if (p / '.git').exists():
+        if (p / 'setup.py').exists():
             os.chdir(p)
             break
         p = p.parent
@@ -69,20 +109,33 @@ def set_common_env():
 
 class _EnvironWrapper(_Environ):
     def __setitem__(self, name: str, value: str) -> None:
-        orig = self.get(name, '')
+        orig = self.get(name, None)
         _Environ.__setitem__(self, name, value)
         new = self[name]
 
-        if orig == new:
-            return
-
         from .escapes import escape_codes
 
         G = escape_codes['bold_green']
         R = escape_codes['bold_red']
         N = escape_codes['reset']
-        print(f'{R}:: ENV -{name}={orig}{N}', file=sys.stderr, flush=True)
-        print(f'{G}:: ENV +{name}={new}{N}', file=sys.stderr, flush=True)
+
+        if orig == new:
+            pass
+        elif orig == None:
+            print(f'{G}:: ENV+ {name}={new}{N}', file=sys.stderr, flush=True)
+        elif new.startswith(orig):
+            l = len(orig)
+            print(f'{G}:: ENV{N} {name}={new[:l]}{G}{new[l:]}{N}',
+                  file=sys.stderr,
+                  flush=True)
+        elif new.endswith(orig):
+            l = len(new) - len(orig)
+            print(f'{G}:: ENV{N} {name}={G}{new[:l]}{N}{new[l:]}',
+                  file=sys.stderr,
+                  flush=True)
+        else:
+            print(f'{R}:: ENV- {name}={orig}{N}', file=sys.stderr, flush=True)
+            print(f'{G}:: ENV+ {name}={new}{N}', file=sys.stderr, flush=True)
 
 
 def monkey_patch_environ():